Spark Plugs...

[NEWBEBOATER]

Looking At My Plugs On My Aq125b I See A Big Difference ..
Plug On Cyl.1 Is Black 2 And 3 Are Coco And 4 Is White.

Think That Is A Carb Adjustment Issue?

 

[searay3]

Re: Spark Plugs...

A white,clean new looking plug means water ingestion. How old are the manifolds/risers etc. If in salt and more than a couple of years old, they are due...The black means rich and brown is normal....with the clean plug, the others at this point do not matter.

 

[NEWBEBOATER]

Re: Spark Plugs...

fresh water and i is it possible no spark is getting to number 4?
is there a way to tune a single carb. so all are about the same color..

 

[Fishermark]

Re: Spark Plugs...

The big differences in color do not indicate a carb adjustment problem. If that was the only problem, they would all look the same.

The #1 plug - is it fouled looking? Is the black oily or covered with soot?

#2 and #3 sound "normal."

I would agree with the possibility of water getting into #4 - it is getting steam cleaned while the engine is running.